The phrase 'making it challenging' is correct and usable in written English.
You can use this phrase when you are referring to something complicated or difficult to do. For example: "The task was difficult and required a lot of planning, making it challenging to complete."
In comparison to the human eye, the rodent eye has a large lens filling up most of the vitreous cavity, making it challenging to image the anterior segment.
It is a seclusive species, making it challenging to observe in its natural habitat.
The field is broad, and much work has been carried out in these areas, making it challenging to cover it in its entirety.
Export is generated automatically when the villagers are gathering, but its gather rate is much slower than other resources, making it challenging to afford a large foreign army.
The book's condensed presentation of complex ideas, like evolvability, is only sparingly seasoned with examples, making it challenging reading.
The solubility of CsBr is on the other hand rather limited, making it challenging to obtain high-quality CsPbBr3 films.
Further, hops vary considerable in essential oil content, making it challenging to achieve a consistent hoppy taste in beer.
Travel is also an issue for artists: People in Kosovo need visas to travel almost anywhere, making it challenging for artists to take part in international shows.
The creative briefs that agencies now receive from clients "are very open-ended," he added, making it challenging to determine the right platforms.
Differences in educational background, language barriers, and overwhelming work schedules can cause mutual misunderstandings between parents and teachers, making it challenging to work together to support their students.
Unfortunately, the source ASs lack incentives to cooperate because the collateral damage of LFAs to them may be negligible, making it challenging to eradicate LFAs.
